Galaxy Note 8.0 has an 8.0″ diplay. It shares a lot of internal hardware with the Samsung Galaxy Note 10.1. It features the Samsung Exynos 4412 processor with a 1280 x 800 screen resolution, although the Note 8.0 has a slightly higher clock speed and ppi. It has 5MP camera. At the time of its release, it ran on Android 4.1 Jelly Bean.
Galaxy Note 8.0 is more than 2 years old. So Samsung wont provide official Android Marshmallow support. But you can install Android Marshmallow on it using CM 13 ROM. This ROM will update Samsung Galaxy Note 8.0 (GSM) to Android 6.0.1 Marshmallow. A detailed guide is given below.